JP7089156B2 - Laminated peeling container - Google Patents

Description

The present invention relates to a laminated stripping container in which the inner bag shrinks when the contents are discharged, and in particular, a novel laminated stripping container designed to prevent inadvertent peeling of the outer shell and the inner bag at the mouth. It is about.

Conventionally, between a container body having an outer shell container and an inner bag and the inner bag shrinking as the contents decrease, and an intermediate space between the outer shell container and the inner bag and an outer space of the container body. Laminated release containers provided with a check valve that regulates the inflow and outflow of air are known (see, for example, Patent Documents 1 and 2).

In the laminated peeling container disclosed in Patent Document 1, a valve is built in a cap attached to the mouth of the container body. In the laminated peeling container disclosed in Patent Document 2, a valve is provided inside the body of the outer shell.

Japanese Unexamined Patent Publication No. 2013-35557 Japanese Unexamined Patent Publication No. 4-267727

By the way, this kind of laminated peeling container is manufactured by extruding a laminated parison in a molten state and blow molding it, and is completed as a product by cutting and removing unnecessary portions after blow molding. This unnecessary portion is generally cut using a blade.

In this case, the end face of the cut outer shell and the end face of the inner bag are exposed at the tip of the mouth of the laminated peeling container cut by the blade. At the tip of the mouth where the end faces of the laminated outer shell and inner bag are exposed, the inner bag may inadvertently peel off from the outer shell, which is a factor that impairs the quality and reliability of the laminated peeling container. It has become. In particular, in a pump-type laminated peeling container, the inner bag of the mouth may be turned over or fall off due to interference when inserting a filling nozzle or pump, friction with the packing when the pump is wound, negative pressure inside the container when the pump is operating, etc. There is a risk of If the inner bag peels off at the mouth, the contents may invade between the outer shell and the inner bag, and if the contents intrude, problems such as leakage from the outside air introduction hole may occur. There is.

The present invention has been made in view of such circumstances, and provides a laminated peeling container having high quality and reliability without careless peeling of the outer shell and the inner bag at the tip of the mouth. ..

According to the present invention, it is a laminated peeling container having an outer shell and an inner bag, and the inner bag shrinks as the contents contained in the inner bag decreases, and includes a container body and a protective member. The container body is provided with a mouth portion, and the end faces of the outer shell and the inner bag are exposed at the tip of the mouth portion, and the protective member is attached to the mouth portion so as to protect the end face. A laminated stripping container is provided.

In the laminated peeling container of the present invention, since the protective member for protecting the end faces of the outer shell and the inner bag is attached to the mouth portion, the peeling of the outer shell and the inner bag is surely suppressed.

Hereinafter, various embodiments of the present invention will be illustrated. The embodiments shown below can be combined with each other.
Preferably, the laminated stripping container according to the above description, wherein the protective member includes an annular end face covering portion and an annular rib, and the end face covering portion covers the end faces of the outer shell and the inner bag. The rib is a laminated peeling container that abuts on the inner peripheral surface of the mouth portion.
Preferably, the laminated stripping container is the above-mentioned laminated stripping container, wherein the end face covering portion is configured so as not to protrude from the outer edge of the tip.
Preferably, in the laminated peeling container described above, where the radius of the circumscribed circle of the end face covering portion is R1 and the radius of the circumscribed circle at the tip is R2, R1 / R2 <1. be.
Preferably, in the above-mentioned laminated peeling container, the end face covering portion includes a base portion and a narrow portion, and the narrow portion is a portion narrower than the base portion and is a portion of the tip thereof. The width between the outer edge and the outer edge of the end face covering portion is wider in the narrow portion than in the base portion, and is a laminated peeling container.
Preferably, it is the laminated stripping container described above, wherein an annular convex portion is provided on the upper surface of the end face covering portion.
Preferably, the laminated stripping container according to the above description, wherein the annular convex portion has a tapered cross section perpendicular to the circumferential direction.
Preferably, the laminated stripping container according to the above description, wherein the protective member is a laminated stripping container that is attached to the mouth portion by press-fitting the rib into the mouth portion.
Preferably, it is the laminated stripping container according to the above description, wherein the rib is a laminated stripping container provided with a reduced diameter portion whose diameter is reduced toward the tip of the rib.
Preferably, it is the laminated stripping container described above, and the holding member is a laminated stripping container made of polyolefin.
Preferably, it is the laminated peeling container described above, wherein the protective member is an annular member and is welded to the end face.
Preferably, it is the above-mentioned laminated peeling container, in which the protective member is a disk-shaped member and is welded to the end face.
Preferably, the laminated stripping container is the above-mentioned laminated stripping container, in which the tip of the mouth portion is enlarged in diameter and the outer shell and the inner bag are inclined.
Preferably, it is the laminated peeling container described above, which is a pump-type container, which is a laminated peeling container.

It is a perspective view of the laminated peeling container 1 of 1st Embodiment of this invention. It is an exploded perspective view near the mouth part 4 of FIG. FIG. 1 is a cross-sectional view of the vicinity of the mouth portion 4 of FIG. 1 (the pump 50 is a right side view except for the mounting portion 52). 3 is an enlarged view showing only the mouth portion 4 and the protective member 40 in the region A in FIG. 3, FIG. 4A shows a state immediately before the protective member 40 is attached to the mouth portion 4, and FIG. 4B is a protective member. 40 shows a state of being attached to the mouth portion 4. It is a perspective view of the protective member 40. It is a top view which shows only the tip 4a of the mouth part 4 and the protective member 40. The protective member 40 is provided with hatching for convenience of illustration. It is an enlarged view corresponding to FIG. 4B which shows the modification of the protective member 40. It is a figure which shows the vicinity of the mouth part of the laminated peeling container 1 of the 2nd Embodiment of this invention, FIG. 8A is a schematic perspective view which shows the state before mounting of the ring-shaped protective member 40, and FIG. FIG. 8C is a schematic perspective view showing a welded state of 40, and FIG. 8C is a schematic cross-sectional view showing a welded state of the ring-shaped protective member 40. It is schematic cross-sectional view of the main part which shows the state which attached the cap 30 to the container body 2 of the 2nd Embodiment of this invention. It is a figure which shows the vicinity of the mouth part of the laminated stripping container 1 of the 3rd Embodiment of this invention, FIG. 10A is a schematic perspective view which shows the state before mounting of the disk-shaped protective member 40, and FIG. FIG. 10C is a schematic perspective view showing a welded state of the protective member 40, and FIG. 10C is a schematic cross-sectional view showing a welded state of the disk-shaped protective member 40. FIG. 5 is an exploded perspective view showing an attached state of a ring-shaped protective member 40 in a laminated peeling container 1 having an enlarged mouth tip according to a fourth embodiment of the present invention. It is a figure which shows the vicinity of the mouth part of the laminated peeling container 1 of the 5th Embodiment of this invention, is a schematic perspective view which shows the state before mounting of the ring-shaped protective member 40, FIG. 12B is a ring-shaped protective member 40 It is a schematic perspective view which shows the welding state of.

Hereinafter, embodiments of the present invention will be described. The various features shown in the embodiments shown below can be combined with each other. In addition, the invention is independently established for each feature.

1. 1. 1st Embodiment As shown in FIGS. 1 to 7, the laminated peeling container 1 of the first embodiment of the present invention includes a container main body 2, a protective member 40, a pump 50, and a packing 60.

<Container body 2>
The container main body 2 includes an accommodating portion 3 for accommodating the contents and a mouth portion 4 for discharging the contents from the accommodating portion 3. As shown in FIGS. 3 to 4, the container body 2 includes an outer shell 11 composed of an outer layer and an inner bag 12 composed of an inner layer in the accommodating portion 3 and the mouth portion 4, and the contents are reduced. As a result, the inner bag 12 contracts. The outer shell 11 and the inner bag 12 are molded in a state of being integrally joined by blow molding of a multi-layer parison, and the usage mode thereof is, for example, from the outer shell 11 in advance at a portion other than the mouth 4 before use. The inner bag 12 is peeled off and filled with the contents until the inner bag 12 comes into contact with the outer shell 11. By pushing out the contents, the inner bag 12 contracts smoothly. Alternatively, the inner bag 12 may be left in a state of being joined to the outer shell 11, and the inner bag 12 may be separated from the outer shell 11 and contracted as the contents are discharged.

The outer shell 11 is formed to be thicker than the inner bag 12 so as to have high resilience. The outer shell 11 is composed of, for example, low-density polyethylene, linear low-density polyethylene, high-density polyethylene, polypropylene, an ethylene-propylene copolymer and a mixture thereof. The outer shell 11 may have a plurality of layers. The inner bag 12 is preferably composed of a plurality of layers. For example, an EVOH layer made of ethylene-vinyl alcohol copolymer (EVOH) resin is used for the layer in contact with the outer layer, and for example, low density polyethylene, linear low density polyethylene, high density polyethylene is used for the layer in contact with the contents. , Polyethylene, ethylene-propylene copolymers and mixtures thereof and the like can be used as an inner layer made of polyolefin. Then, it is preferable to use an adhesive layer between the EVOH layer and the inner surface layer.

As shown in FIGS. 1 to 3, in the shoulder portion of the accommodating portion 3, a recess 7a is formed in the outer shell 11, and an outside air introduction hole 15 is provided here. The outside air introduction hole 15 is a through hole provided only in the outer shell 11 and does not reach the inner bag 12. Then, by introducing air from the outside air introduction hole 15, the outside air can be introduced between the outer shell 11 and the inner bag 12.

FIG. 4 shows the vicinity of the mouth portion 4 of the container body 2, and in the container body 2 in which the unnecessary portion is cut and removed after blow molding, as shown in FIG. 4, the outer shell is at the tip 4a of the mouth portion 4. The cut end face 11d of 11 and the cut end face 12d of the inner bag 12 are exposed. If the end surface 11d of the outer shell 11 and the end surface 12d of the inner bag 12 are exposed in this way, there is a possibility that the inner bag 12 may be inadvertently peeled off from the end surface 12d.

<Protective member 40>
In the laminated peeling container 1 of the present embodiment, the protective member 40 is attached to the mouth portion 4 so as to protect the exposed end face 11d of the outer shell 11 and the end face 12d of the inner bag 12, and the peeling of the inner bag 12 is prevented. I try to do it. The protective member 40 is mounted so as to be in contact with the end faces 11d and 12d.

The protective member 40 includes an annular end face covering portion 43 and an annular rib (sleeve) 42. The end face covering portion 43 covers the end faces 11d and 12d of the outer shell 11 and the inner bag 12. The rib 42 abuts on the inner peripheral surface of the mouth portion 4. The end face covering portion 43 and the rib 42 are preferably annular.

As shown in FIG. 4, if the radius of the circumscribed circle of the end face covering portion 43 is R1 and the radius of the circumscribed circle of the tip 4a of the mouth portion 4 is R2, then R1 / R2 <1. In this case, the outer edge of the end face covering portion 43 does not protrude from the outer edge of the tip 4a of the mouth portion 4. If the outer edge of the end face covering portion 43 protrudes from the outer edge of the tip 4a of the mouth portion 4, the protective member 40 may be caught by something caught on the protruding portion of the end face covering portion 43 when the container is taken out from the package or at the filling line or the like. May fall off from the mouth 4. On the other hand, in the present embodiment, since the end face covering portion 43 does not have a protruding portion, the protective member 40 is suppressed from falling off. R1 / R2 is, for example, 0.900 to 0.995, and specifically, for example, 0.900, 0.910, 0.920, 0.930, 0.940, 0.950, 0.960, It is 0.970, 0.980, 0.990, 0.995, and may be in the range between any two of the numerical values exemplified here. In this embodiment, R1 / R2 is about 0.986.

As shown in FIG. 7, even when R1 / R2 = 1, there is no protruding portion in the end face covering portion 43, but in this case, the end face covering portion 43 is slightly large due to variations during manufacturing. Then, since the outer edge of the end face covering portion 43 protrudes from the outer edge of the tip 4a of the mouth portion 4, R1 / R2 <1 is preferable, and 0.995 or less is more preferable.

The area ratio of the end face covering portion 43 covering the end faces 11d and 12d is, for example, 30 to 99%, preferably 60 to 95%, and specifically, for example, 30, 40, 50, 60, 70, 80, 90. , 91, 92, 93, 94, 95, 96, 97, 98, 99%, and may be within the range between any two of the numerical values exemplified here. The end face covering portion 43 preferably covers the boundary between the end faces 11d and 12d. As a result, the peeling of the inner bag 12 is more effectively suppressed. In this embodiment, the area ratio is about 92%.

As shown in FIG. 6, the width W between the outer edge of the tip 4a of the mouth portion 4 and the outer edge of the end face covering portion 43 is substantially constant over the entire circumference, but is wide provided in a part in the circumferential direction. In the region 47, the width W is larger than in the other regions. When the protective member 40 is formed by injection molding, burrs may remain at the position of the gate, but by arranging the gate at the position corresponding to the wide area 47, even if burrs remain, the burrs will remain at the mouth 4 It is suppressed that the tip 4a of the tip 4a protrudes from the outer edge. The angle range in which the wide region 47 is provided is, for example, 5 to 90 degrees, preferably 10 to 30 degrees, and specifically, for example, 5, 10, 15, 20, 25, 30, 40, 50, 60. It is 70, 80, 90 degrees, and may be within the range between any two of the numerical values exemplified here. In this embodiment, this angle range is about 23 degrees.

The outer edge of the end face covering portion 43 is substantially circular, but a recessed portion 43a recessed from the outer circumference of the circle is provided in a part thereof. A wide region 47 is formed by providing the retracted portion 43a on the end face covering portion 43. In the present embodiment, the retracting portion 43a is provided by making the outer edge of the end face covering portion 43 linear. Further, the width of the end face covering portion 43 is substantially constant over the entire circumference, but in the retracted portion 43a, the width of the end face covering portion 43 is narrowed by the amount that the outer edge is retracted.

An annular convex portion 43b is provided on the upper surface of the end surface covering portion 43. When the protective member 40 is made of a material such as polyolefin, which is relatively hard to be elastically deformed, a gap is likely to be formed between the protective member 40 and the pump 50. However, by providing the annular convex portion 43b, when the pump 50 is attached to the mouth portion 4, the annular convex portion 43b is pressed and elastically deformed, so that a gap is less likely to occur between the protective member 40 and the pump 50. Become. The annular convex portion 43b preferably has a tapered cross section perpendicular to the circumferential direction. In this case, the portion closer to the tip of the annular convex portion 43b is more likely to be deformed, so that a gap between the protective member 40 and the pump 50 is less likely to occur. The tapered shape is preferably triangular.

As shown in FIG. 4A, when the protective member 40 is not attached to the mouth portion 4, the radius of the circumscribed circle of the rib 42 is R3, and the radius of the inscribed circle of the mouth portion 4 at the portion where the rib 42 abuts. Is R4, and R3 / R4 is 1.01 or more. In this case, since the outer diameter of the rib 42 is slightly larger than the inner diameter of the mouth portion 4, the protective member 40 is press-fitted into the mouth portion 4, and the protective member 40 is easily held stably in the mouth portion 4. Become. The rib 42 includes a reduced diameter portion 42a whose outer diameter is reduced toward the tip of the rib 42. By providing the reduced diameter portion 42a, the protective member 40 can be easily press-fitted. The protective member 40 may be attached to the mouth portion 4 by welding.

<Pump 50, packing 60>
The pump 50 includes a nozzle portion 51 for pressing operation, a attachment portion 52 to the container body 2, and a suction pipe 53 inserted into the container body 2. The pump 50 is attached to the mouth 4 to which the protective member 40 is attached by a screwing method, and is attached via the packing 60. By interposing the packing 60, the airtightness is ensured. The packing 60 can be omitted if it is not needed.

In the case of a pump-type laminated stripping container, the inside of the mouth is caused by interference when inserting the filling nozzle or pump, especially the friction of the packing when screwing the pump because it is a screwing method, and the negative pressure inside the container when the pump is operating. There is a risk that the bag will turn over or fall off, but by attaching the protective member 40, the inner bag 12 will not come off even if these forces are applied.

When the contents in the inner bag 12 are ejected from the mouth portion 4 by operating the nozzle portion 51, the inner bag 12 contracts. As the inner bag 12 contracts, outside air is introduced between the inner bag 12 and the outer shell 11 through the outside air introduction hole 15. Therefore, the outer shell 11 does not shrink, and the inner bag 12 contracts away from the outer shell 11.

2. 2. Second Embodiment In this embodiment, as shown in FIG. 8A, the protective member 40 is, for example, an annular (ring-shaped) aluminum foil. As shown in FIGS. 8B and 8C, this is brought into contact with the tip of the mouth portion 4 (that is, the end surface 11d of the outer shell 11 and the end surface 12d of the inner bag 12) and welded to be attached. It is preferable that the end portion of the mouth portion 4 has a welding allowance of about 1 mm. By welding the protective member 40, the outer shell 11 and the inner bag 12 are fixed to each other via the protective member 40, and careless peeling of the inner bag 12 is suppressed.

FIG. 9 shows a state in which the cap 30 is attached to the container body 2 to which the protective member 40 is attached (welded). The cap 30 is attached to the mouth 4 of the container body 2, and as shown in FIG. 9, the cap 30 is directly fixed to the mouth 4 of the container body 2 by a plug, and the outer periphery of the fixing portion 31. It is composed of a cap body 32 screwed to a male screw portion 31a provided on the surface. A female screw portion 32a is provided on the inner surface of the cap body 32.

The fixing portion 31 is attached to the mouth portion 4 of the container main body 2 by tapping, and a male screw portion 31a is formed on the outer peripheral surface thereof.

The cap body 32 is composed of a check valve 33, a lid portion 45 that covers the spout via a hinge 34, and the like, and has an inner ring 35 that abuts on the inner peripheral surface of the mouth portion 4 when mounted. There is. The check valve 33 is attached so as to be fitted into the inner ring 35 so as to open and close the injection hole 38 provided in the valve seat portion 36 in the inner ring 35, and the outer peripheral portion is pressed and fixed by the pressing member 37. Has been done.

By screwing the cap body 32 to the fixing portion 31, the inner ring 35 of the cap body 32 enters the mouth portion 4, and the outer peripheral surface thereof comes into contact with the inner peripheral surface of the mouth portion 4 to be in a sealed state.

In the present embodiment, the contents in the inner bag 12 can be discharged from the mouth 4 by applying a compressive force to the outer shell 11. When the force applied to the outer shell 11 after discharging the contents is removed, the outer shell 11 tries to return to its original shape by its own restoring force. At this time, outside air is introduced between the inner bag 12 and the outer shell 11 through the outside air introduction hole 15. Further, a valve (not shown) can be attached to the outside air introduction hole 15. This valve is configured to close the outside air introduction hole 15 when a compressive force is applied to the outer shell 11, and open the outside air introduction hole 15 when the compressive force is removed. In this case, the compressive force applied to the outer shell 11 is easily transmitted to the inner bag 12.

3. 3. Third Embodiment In this embodiment, as shown in FIG. 10A, the protective member 40 is a disc-shaped protective member 40 (for example, a disc-shaped aluminum foil). The disk-shaped protective member 40 is brought into contact with the tip of the mouth portion 4 (the end surface 11d of the outer shell 11 and the end surface 12d of the inner bag 12) and welded. In this case, as shown in FIGS. 10B and 10C, since the mouth portion 4 of the container body 2 is sealed by the protective member 40, the central portion of the protective member 40 is torn and opened at the start of use. Is preferable. As a means for facilitating opening, a cross-shaped slit 41, a half cut, or the like may be provided at the center position of the disk-shaped protective member 40.

4. Fourth Embodiment The protective member 40 is attached (welded) to the end surface 11d of the outer shell 11 of the tip 4a of the mouth portion 4 and the end surface 12d of the inner bag 12, but by expanding the diameter of the tip of the mouth portion 4. , The contact area can be expanded to make the fixed state stronger. For example, as shown in FIG. 11, when the diameter of the tip of the mouth portion 4 is expanded, the outer shell 11 and the inner bag 12 become slanted at the tip of the mouth portion 4, and the end faces 11d and 12d, respectively, are slanted with respect to the thickness direction. Will be disconnected. As a result, the dimensions of the end faces 11d and 12d exposed at the tip of the mouth portion 4 are expanded, and in the case of welding, the welding area is expanded and the welding is more strongly fixed.

5. Fifth Embodiment In the present embodiment, as shown in FIG. 12A, a portion where the outer shell 11 and the inner bag 12 are horizontal is provided in the vicinity of the mouth portion 4, and the tip is cut so as to be slightly raised. ing. In this case, as shown in FIG. 12B, the tip portions of the outer shell 11 and the inner bag 12 are crushed by welding, and the protective member 40 and the inner bag 12 are in surface contact with each other.

6. Other Embodiments Although the embodiments to which the present invention is applied have been described above, the present invention is not limited to this embodiment, and various modifications can be made without departing from the gist of the present invention. Needless to say. For example, it is effective to apply the present invention not only to the pump type but also to the container in which the cap is screwed in because frictional force is applied by rotation and the inner bag may be peeled off from the outer shell.

1: Laminated peeling container 2: Container body 3: Storage part 4: Mouth part 4a: Tip 7a: Recessed part 11: Outer shell 11d: End face 12: Inner bag 12d: End face 15: Outside air introduction hole 30: Cap 31: Fixed part 31a : Male threaded portion 32: Cap body 32a: Female threaded portion 33: Check valve 34: Hinge 35: Inner ring 36: Valve seat portion 37: Pressing member 38: Injection hole 40: Protective member 41: Slit 42: Rib 42a : Reduced diameter portion 43: End face covering portion 43a: Retracting portion 43b: Circular convex portion 45: Cover portion 47: Wide area 50: Pump 51: Nozzle portion 52: Mounting portion 53: Suction pipe 60: Packing

Claims (10)

A laminated stripping container that has an outer shell and an inner bag, and the inner bag shrinks as the contents contained in the inner bag decrease.
Equipped with a container body, protective member, and pump,
The container body is provided with a mouth portion, and the end faces of the outer shell and the inner bag are exposed at the tip of the mouth portion.
The protective member is attached to the mouth portion so as to protect the end face.
The protective member includes an annular end face covering portion and an annular rib in a state where the protective member is not attached to the mouth portion .
With the protective member attached to the mouth portion, the end face covering portion covers the end faces of the outer shell and the inner bag, and the rib abuts on the inner peripheral surface of the mouth portion.
The pump is a laminated peeling container including a nozzle portion for pressing operation, a attachment portion to the container body, and a suction pipe inserted into the container body. The laminated peeling container according to claim 1.
The end face covering portion is a laminated stripping container configured so as not to protrude from the outer edge of the tip. The laminated peeling container according to claim 2.
When the radius of the circumscribed circle of the end face covering portion is R1 and the radius of the circumscribed circle at the tip is R2, the laminated peeling container has R1 / R2 <1. The laminated peeling container according to any one of claims 1 to 3.
The outer edge of the end face covering portion is provided with a recessed portion recessed from the outer circumference of the circle in a part thereof.
A laminated stripping container in which the width between the outer edge of the tip and the outer edge of the end face covering portion is wider in the retracted portion than in other parts of the end face covering portion. The laminated peeling container according to any one of claims 1 to 4.
A laminated peeling container provided with an annular convex portion on the upper surface of the end face covering portion. The laminated peeling container according to claim 5.
The annular convex portion is a laminated peeling container having a tapered cross section perpendicular to the circumferential direction. The laminated peeling container according to any one of claims 1 to 6.
The protective member is a laminated peeling container attached to the mouth portion by pressing the rib into the mouth portion. The laminated peeling container according to any one of claims 1 to 7.
The rib is a laminated peeling container provided with a reduced diameter portion whose diameter is reduced toward the tip of the rib. The laminated peeling container according to any one of claims 1 to 8.
The protective member is a laminated stripping container made of polyolefin. The laminated peeling container according to any one of claims 1 to 9.
A laminated peeling container in which the tip of the mouth portion is enlarged in diameter and the outer shell and the inner bag are inclined.

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